Amazon recently banned a customer for making what they considered too many returns, and when they did this they also disabled his Kindle account, although the returns were never related to Kindle purchases. So what happens when your Kindle account is taken away? Your Kindle still works, and the books you already bought for it will work, but you can’t download those books ever again (better have made a backup on your PC!), you can’t receive your magazine, blog, or newspaper subscriptions on it anymore, you can’t email documents to Amazon to have them converted and sent to your Kindle, and you can’t buy any new books for the device. That $360 device only works so long as Amazon decides it will work.